17.3- ON THE ROAD

Question 1

Equation for when a vehicle in on top of a hill

Answer 1

mg - S = mv²/r

Question 2

What happens if the vehicle speed exceeds V, where v = gr? (vehicle on top of hill)

Answer 2

vehicle will lose contact with road surface at top of hill

Question 3

Equation for force of friction when vehicle moving around a roundabout?

Answer 3

F = mv²/r

Question 4

For no skidding or slipping to occur, what must the force of friction between the tyres and road surface be like? (vehicle around a roundabout)

Answer 4

must be less than limiting value F, that’s proportional to vehicle’s weight

Question 5

Equation for limiting force of friction (vehicle around a roundabout)

Answer 5

F = mv²/r

F and v have small zero

Question 6

Without banking, what is the centripetal force on a road vehicle provided only by?

Answer 6

sideways friction between vehicle wheels and road surface

Question 7

How can the speed change on a banked track?

Answer 7

speed can be higher

Question 8

Equation for when there is no sideways friction if the speed is such that… (banked track)

Answer 8

v² = grtanθ